Yes, kerbs is a Scrabble word!
...and is worth 11 points in Scrabble, and 12 points in Words with Friends
kerbs
Noun
1. An edge between a sidewalk and a roadway consisting of a line of curbstones (usually forming part of a gutter)
What Scrabble words can I make with the letters in kerbs?
5 Letter Words
4 Letter Words
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3 Letter Words
2 Letter Words